Verification II Standard 1 Back Catalog number: 52019 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C12725510 2,5-Dimethylbenzaldehyd-2,4-dinitrophenylhydrazone, 100mg Price on request 93756 Chlorinated Phenols Standard Price on request 675093 Sodium p-n-tridecylbenzenesulfonate, 10mg Price on request